A coroner has recorded an open verdict after an eight-week-old infant was found to have chlorpheniramine in his blood; investigators and childcare bodies are urged to act on missed forensic opportunities and weak oversight
The death of an eight-week-old boy has prompted a coroner to warn that an antihistamine was probably administered to the infant by the night nanny, apparently to sedate him. The coroner recorded an open verdict after evidence showed the antihistamine chlorpheniramine (often sold as Piriton) was present in the baby’s blood at the time he was found unresponsive on 15 January 2026.
Resuscitation attempts and emergency treatment followed, but the baby was pronounced dead shortly after being discovered.
The inquest brought multiple strands together: witness accounts describing an infant who waked frequently, the toxicology findings from the post-mortem, and the night nanny’s own statements that she had cared for the child through the night.
The coroner said the drug was likely used to make the baby sleep. Medical experts at the hearing told the court that while chlorpheniramine can have sedative effects and has been linked to fatalities in young children, it could not be conclusively proven to be the direct cause of death, leaving the cause recorded as sudden unexpected death in infancy – unexplained.
What the evidence showed
During the inquest, the court heard that the infant had been described as unsettled and fussy and that the night nanny reported feeding him during the night. Toxicology results, however, revealed the presence of the antihistamine in the baby’s bloodstream, a detail that only emerged when the post-mortem report reached the family, police and coroner. The coroner concluded that the drug was probably administered by the night nanny and that it was likely given with the intention to calm or sedate the child, rather than for a medically indicated allergic condition.
Experts accepted by the court explained that medicines containing chlorpheniramine should not be used to induce sleep in infants and are generally only recommended under medical supervision for specific conditions. The inquest highlighted that the drug is available in over-the-counter preparations for symptoms such as allergy, but that its use in very young babies carries risks. The coroner emphasised that although the drug may have contributed to the event, causation to the criminal standard could not be established.
Investigation failures and missed forensic opportunities
The coroner was critical of the initial response by the Metropolitan Police, finding that routine investigative steps which might have established how the drug reached the baby were not taken. Officers who attended the scene on the day did a preliminary assessment and found no obvious signs of injury or neglect; however, they did not search bathroom cabinets, seize feeding bottles, open cupboards in the relevant rooms, or examine the night nanny’s property. Those omissions, the coroner said, meant key forensic opportunities were lost.
Significantly, the night nanny was not arrested or interviewed and their property was not searched until October 2026, many months after the death. By that time, perishable traces and items that might have yielded forensic evidence were no longer available. The coroner remarked that the police appeared reassured by the orderly home environment and did not pursue lines of inquiry that could have investigated third-party drug administration more thoroughly.
Forensic lessons
The inquest underlined how standard procedures—such as seizing bottles and infant feeding equipment pending toxicology—can be important in unexplained infant deaths. The coroner warned that child death investigation teams must avoid being prematurely reassured by appearances and should consider poisoning as a potential factor. She recommended that police training and guidelines be reviewed so that investigations routinely preserve possible evidence in cases where toxicology might later reveal an unexpected substance.
Recommendations and wider childcare concerns
In a published prevention of future deaths report, the coroner expressed two broader concerns: the absence of a national regulatory framework for nannies and the fact that the person found to have administered the antihistamine is apparently still employed in childcare. She advised that nannies should receive clear instruction that they must not give products containing chlorpheniramine to babies except on medical advice and with parents’ explicit agreement. The coroner also suggested reviewing the adequacy of consumer warnings on products that contain the drug.
Childcare organisations such as the National Nanny Association cited the findings as evidence of systemic gaps in oversight. They reiterated calls for mandatory registration, consistent standards and safeguarding checks for in-home carers, arguing that parents often trust titles like “nanny” or “maternity nurse” without clear guarantees of training and regulation. The Metropolitan Police have said they will consider the coroner’s concerns before responding formally.
How this might change practice
The case has prompted calls for policy and practice changes spanning police procedures, product labelling and the regulation of in-home childcare. If implemented, these steps could mean updated police guidance to preserve potential evidence, improved training for child death investigators to consider toxicology early, and stronger rules or registration systems for nannies to ensure basic safeguarding standards are met. The coroner’s report makes clear that when unexplained infant deaths occur, attention to both immediate forensic detail and the wider regulatory environment is essential to protect other families.
